Narrowing searches based on url, author, date, and other attributes is also possible.
For instance, the query
[ Conan sourcename:Poynter ]
restricts searches for "Conan" to items from the blog "Poynter".
Examples of other operators follow:

• sourceurl:http://www.huffingtonpost.com/

items from the blog http://www.huffingtonpost.com/

• author:"Rupert Murdoch"

items by author "Rupert Murdoch"

• sourcename:"E-Media Tidbits"

items from blogs with "E-Media Tidbits" in the name

• title:substantiated

items with "substantiated" in the title

• date:01/28/10

items that appeared on 01/28/10

• body:"sharp gains"

items with "sharp gains" in the body

• date:[01/28/10 TO 02/04/10]

items appearing between 01/28/10 and 02/04/10

• link:http://www.apple.com/pr/library/2010/01/27ipad.html

items linking to http://www.apple.com/pr/library/2010/01/27ipad.html

Note: all operators that take urls will accept simple domain names, which match any item at that domain, or complete item urls.

Ira Glass's ‘This American Life’ Leaves PRI
— Ira Glass had lost his voice. That gentle, reliably nasal, public radio staple of a voice had been worked hoarse. On any given day, this would be an issue for Mr. Glass, 55, whose award-winning show, “This American Life …

‘This American Life’ Considers Self-Distribution on Radio
— The announcement two weeks ago that “This American Life” will part ways on July 1 from its distributor, Public Radio International, has set off a scramble among rivals for rights to the program, one of the most popular on public radio.

ProPublica receives $1M grant from MacArthur Foundation
— ProPublica will receive a $1 million Award for Creative and Effective Institutions from the John D. and Catherine T. MacArthur Foundation, the funder announced Thursday. The nonprofit is the only news organization among the seven recipients selected.

Byliner Announces Public Radio Partnership
— Byliner has arranged a partnership with Public Radio International to make e-books out of select programs that air on the network. The Byliner e-books will be available as text-only downloads to customers who subscribe to Byliner for free …